\vskip10pt
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\begin{figure}[hbt]
\begin{center}
 \includegraphics[width=.9\textwidth]{chapter5/chapter5_20}
\caption{Simulation results for probability of the traffic destination being in the same region with the source is 1}
\label{fig:chapter5_22}
\end{center}
\end{figure}
\clearpage
%}